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/*
* Mesa 3-D graphics library
*
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors:
* Keith Whitwell <keithw@vmware.com>
*/
#include <stdbool.h>
#include <stdio.h>
#include "main/arrayobj.h"
#include "main/glheader.h"
#include "main/bufferobj.h"
#include "main/context.h"
#include "main/enums.h"
#include "main/state.h"
#include "main/varray.h"
#include "main/vtxfmt.h"
#include "vbo_noop.h"
#include "vbo_private.h"
static void
vbo_exec_debug_verts(struct vbo_exec_context *exec)
{
GLuint count = exec->vtx.vert_count;
GLuint i;
printf("%s: %u vertices %d primitives, %d vertsize\n",
__func__,
count,
exec->vtx.prim_count,
exec->vtx.vertex_size);
for (i = 0 ; i < exec->vtx.prim_count ; i++) {
struct _mesa_prim *prim = &exec->vtx.prim[i];
printf(" prim %d: %s %d..%d %s %s\n",
i,
_mesa_lookup_prim_by_nr(prim->mode),
prim->start,
prim->start + prim->count,
prim->begin ? "BEGIN" : "(wrap)",
prim->end ? "END" : "(wrap)");
}
}
static GLuint
vbo_exec_copy_vertices(struct vbo_exec_context *exec)
{
struct _mesa_prim *last_prim = &exec->vtx.prim[exec->vtx.prim_count - 1];
const GLuint sz = exec->vtx.vertex_size;
fi_type *dst = exec->vtx.copied.buffer;
const fi_type *src = exec->vtx.buffer_map + last_prim->start * sz;
return vbo_copy_vertices(exec->ctx, exec->ctx->Driver.CurrentExecPrimitive,
last_prim, sz, false, dst, src);
}
/* TODO: populate these as the vertex is defined:
*/
static void
vbo_exec_bind_arrays(struct gl_context *ctx)
{
struct vbo_context *vbo = vbo_context(ctx);
struct gl_vertex_array_object *vao = vbo->VAO;
struct vbo_exec_context *exec = &vbo->exec;
GLintptr buffer_offset;
if (exec->vtx.bufferobj) {
assert(exec->vtx.bufferobj->Mappings[MAP_INTERNAL].Pointer);
buffer_offset = exec->vtx.bufferobj->Mappings[MAP_INTERNAL].Offset +
exec->vtx.buffer_offset;
} else {
/* Ptr into ordinary app memory */
buffer_offset = (GLbyte *)exec->vtx.buffer_map - (GLbyte *)NULL;
}
const gl_vertex_processing_mode mode = ctx->VertexProgram._VPMode;
/* Compute the bitmasks of vao_enabled arrays */
GLbitfield vao_enabled = _vbo_get_vao_enabled_from_vbo(mode, exec->vtx.enabled);
/* At first disable arrays no longer needed */
_mesa_disable_vertex_array_attribs(ctx, vao, VERT_BIT_ALL & ~vao_enabled);
assert((~vao_enabled & vao->Enabled) == 0);
/* Bind the buffer object */
const GLuint stride = exec->vtx.vertex_size*sizeof(GLfloat);
_mesa_bind_vertex_buffer(ctx, vao, 0, exec->vtx.bufferobj, buffer_offset,
stride);
/* Retrieve the mapping from VBO_ATTRIB to VERT_ATTRIB space
* Note that the position/generic0 aliasing is done in the VAO.
*/
const GLubyte *const vao_to_vbo_map = _vbo_attribute_alias_map[mode];
/* Now set the enabled arrays */
GLbitfield mask = vao_enabled;
while (mask) {
const int vao_attr = u_bit_scan(&mask);
const GLubyte vbo_attr = vao_to_vbo_map[vao_attr];
const GLubyte size = exec->vtx.attr[vbo_attr].size;
const GLenum16 type = exec->vtx.attr[vbo_attr].type;
const GLuint offset = (GLuint)((GLbyte *)exec->vtx.attrptr[vbo_attr] -
(GLbyte *)exec->vtx.vertex);
assert(offset <= ctx->Const.MaxVertexAttribRelativeOffset);
/* Set and enable */
_vbo_set_attrib_format(ctx, vao, vao_attr, buffer_offset,
size, type, offset);
/* The vao is initially created with all bindings set to 0. */
assert(vao->VertexAttrib[vao_attr].BufferBindingIndex == 0);
}
_mesa_enable_vertex_array_attribs(ctx, vao, vao_enabled);
assert(vao_enabled == vao->Enabled);
assert(!exec->vtx.bufferobj ||
(vao_enabled & ~vao->VertexAttribBufferMask) == 0);
_mesa_set_draw_vao(ctx, vao, _vbo_get_vao_filter(mode));
}
/**
* Unmap the VBO. This is called before drawing.
*/
static void
vbo_exec_vtx_unmap(struct vbo_exec_context *exec)
{
if (exec->vtx.bufferobj) {
struct gl_context *ctx = exec->ctx;
if (ctx->Driver.FlushMappedBufferRange &&
!ctx->Extensions.ARB_buffer_storage) {
GLintptr offset = exec->vtx.buffer_used -
exec->vtx.bufferobj->Mappings[MAP_INTERNAL].Offset;
GLsizeiptr length = (exec->vtx.buffer_ptr - exec->vtx.buffer_map) *
sizeof(float);
if (length)
ctx->Driver.FlushMappedBufferRange(ctx, offset, length,
exec->vtx.bufferobj,
MAP_INTERNAL);
}
exec->vtx.buffer_used += (exec->vtx.buffer_ptr -
exec->vtx.buffer_map) * sizeof(float);
assert(exec->vtx.buffer_used <= exec->ctx->Const.glBeginEndBufferSize);
assert(exec->vtx.buffer_ptr != NULL);
ctx->Driver.UnmapBuffer(ctx, exec->vtx.bufferobj, MAP_INTERNAL);
exec->vtx.buffer_map = NULL;
exec->vtx.buffer_ptr = NULL;
exec->vtx.max_vert = 0;
}
}
static bool
vbo_exec_buffer_has_space(struct vbo_exec_context *exec)
{
return exec->ctx->Const.glBeginEndBufferSize > exec->vtx.buffer_used + 1024;
}
/**
* Map the vertex buffer to begin storing glVertex, glColor, etc data.
*/
void
vbo_exec_vtx_map(struct vbo_exec_context *exec)
{
struct gl_context *ctx = exec->ctx;
const GLenum usage = GL_STREAM_DRAW_ARB;
GLenum accessRange = GL_MAP_WRITE_BIT | /* for MapBufferRange */
GL_MAP_UNSYNCHRONIZED_BIT;
if (ctx->Extensions.ARB_buffer_storage) {
/* We sometimes read from the buffer, so map it for read too.
* Only the persistent mapping can do that, because the non-persistent
* mapping uses flags that are incompatible with GL_MAP_READ_BIT.
*/
accessRange |= GL_MAP_PERSISTENT_BIT |
GL_MAP_COHERENT_BIT |
GL_MAP_READ_BIT;
} else {
accessRange |= GL_MAP_INVALIDATE_RANGE_BIT |
GL_MAP_FLUSH_EXPLICIT_BIT |
MESA_MAP_NOWAIT_BIT;
}
if (!exec->vtx.bufferobj)
return;
assert(!exec->vtx.buffer_map);
assert(!exec->vtx.buffer_ptr);
if (vbo_exec_buffer_has_space(exec)) {
/* The VBO exists and there's room for more */
if (exec->vtx.bufferobj->Size > 0) {
exec->vtx.buffer_map = (fi_type *)
ctx->Driver.MapBufferRange(ctx,
exec->vtx.buffer_used,
ctx->Const.glBeginEndBufferSize
- exec->vtx.buffer_used,
accessRange,
exec->vtx.bufferobj,
MAP_INTERNAL);
exec->vtx.buffer_ptr = exec->vtx.buffer_map;
}
else {
exec->vtx.buffer_ptr = exec->vtx.buffer_map = NULL;
}
}
if (!exec->vtx.buffer_map) {
/* Need to allocate a new VBO */
exec->vtx.buffer_used = 0;
if (ctx->Driver.BufferData(ctx, GL_ARRAY_BUFFER_ARB,
ctx->Const.glBeginEndBufferSize,
NULL, usage,
GL_MAP_WRITE_BIT |
(ctx->Extensions.ARB_buffer_storage ?
GL_MAP_PERSISTENT_BIT |
GL_MAP_COHERENT_BIT |
GL_MAP_READ_BIT : 0) |
GL_DYNAMIC_STORAGE_BIT |
GL_CLIENT_STORAGE_BIT,
exec->vtx.bufferobj)) {
/* buffer allocation worked, now map the buffer */
exec->vtx.buffer_map =
(fi_type *)ctx->Driver.MapBufferRange(ctx,
0, ctx->Const.glBeginEndBufferSize,
accessRange,
exec->vtx.bufferobj,
MAP_INTERNAL);
}
else {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "VBO allocation");
exec->vtx.buffer_map = NULL;
}
}
exec->vtx.buffer_ptr = exec->vtx.buffer_map;
exec->vtx.buffer_offset = 0;
if (!exec->vtx.buffer_map) {
/* out of memory */
_mesa_install_exec_vtxfmt(ctx, &exec->vtxfmt_noop);
}
else {
if (_mesa_using_noop_vtxfmt(ctx->Exec)) {
/* The no-op functions are installed so switch back to regular
* functions. We do this test just to avoid frequent and needless
* calls to _mesa_install_exec_vtxfmt().
*/
_mesa_install_exec_vtxfmt(ctx, &exec->vtxfmt);
}
}
if (0)
printf("map %d..\n", exec->vtx.buffer_used);
}
/**
* Execute the buffer and save copied verts.
*/
void
vbo_exec_vtx_flush(struct vbo_exec_context *exec)
{
/* Only unmap if persistent mappings are unsupported. */
bool persistent_mapping = exec->ctx->Extensions.ARB_buffer_storage &&
exec->vtx.bufferobj &&
exec->vtx.buffer_map;
if (0)
vbo_exec_debug_verts(exec);
if (exec->vtx.prim_count &&
exec->vtx.vert_count) {
exec->vtx.copied.nr = vbo_exec_copy_vertices(exec);
if (exec->vtx.copied.nr != exec->vtx.vert_count) {
struct gl_context *ctx = exec->ctx;
/* Prepare and set the exec draws internal VAO for drawing. */
vbo_exec_bind_arrays(ctx);
if (ctx->NewState)
_mesa_update_state(ctx);
if (!persistent_mapping)
vbo_exec_vtx_unmap(exec);
assert(ctx->NewState == 0);
if (0)
printf("%s %d %d\n", __func__, exec->vtx.prim_count,
exec->vtx.vert_count);
ctx->Driver.Draw(ctx, exec->vtx.prim, exec->vtx.prim_count,
NULL, GL_TRUE, 0, exec->vtx.vert_count - 1, 1, 0,
NULL, 0);
/* Get new storage -- unless asked not to. */
if (!persistent_mapping)
vbo_exec_vtx_map(exec);
}
}
if (persistent_mapping) {
exec->vtx.buffer_used += (exec->vtx.buffer_ptr - exec->vtx.buffer_map) *
sizeof(float);
exec->vtx.buffer_map = exec->vtx.buffer_ptr;
/* Set the buffer offset for the next draw. */
exec->vtx.buffer_offset = exec->vtx.buffer_used;
if (!vbo_exec_buffer_has_space(exec)) {
/* This will allocate a new buffer. */
vbo_exec_vtx_unmap(exec);
vbo_exec_vtx_map(exec);
}
}
if (exec->vtx.vertex_size == 0)
exec->vtx.max_vert = 0;
else
exec->vtx.max_vert = vbo_compute_max_verts(exec);
exec->vtx.buffer_ptr = exec->vtx.buffer_map;
exec->vtx.prim_count = 0;
exec->vtx.vert_count = 0;
}
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